Anton81 wrote:
> Hi!
>
> it seems that
>
> class Obj:
> def __init__(self):
> f=file("obj.dat")
> self=pickle.load(f)
> ...
>
> doesn't work. Can an object load itself with pickle from a file somehow?
> What's an easy solution?
>
> Anton
>
That won't work, but the following will. An object's attributes can be
accessed and set through the __dict__ attribute, and its class through
the __class__ attribute:
>>> class A: # define class A
... pass
...
>>> a = A() # create an instance
>>> a.__dict__ # It has no attributes
{}
>>> a.__dict__ = {'c':1, 'b':2} # Give it some
>>> a.b # Verify
2
>>> a.c
1
>>> a.__class__ # Examine its class
<class __main__.A at 0xb7da12fc>
>>> class B:
... pass
...
>>> a.__class__ = B # Change its class
>>> a.__class__ # Verify
<class __main__.B at 0xb7da129c>
Both the __dict__ and the __class__.__name__ could be pickled.
Gary Herron
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